feat(macro-vibes): rename BTC Signal → Macro Vibes; add MacroPanel UI

Module rename across page H1, navbar tab, URL (/en/btc → /en/macro),
all metadata/JSON-LD, sitemap, llms.txt, opengraph image, and SystemControl
copy. Old /btc route fully removed.

New components/btc/MacroPanel.tsx polls /api/macro/snapshot and lays out
the 8 indicators in four sections (Valuation / Bottom trigger reference /
Market structure / Sentiment & flows / Positioning) with tone-coloured
values, current-band threshold chips, and a single CoinGlass / source
chart link per card. Composite -100..+100 needle pulses on score change.

Also fixes the pinned bottom-reversal alert on the homepage, which still
linked to the now-404 /en/btc — now routes to /en/macro.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/[locale]/kol/KolPageClient.tsx

@@ -9,6 +9,7 @@ import type {
 } from '@/types'
 import { getKolPosts, getKolPost, getKolDigest, getKolChanges, getKolDivergence } from '@/lib/api'
 import { swrFetch } from '@/lib/cache'
+import PageHint from '@/components/ui/PageHint'
 
 /**
  * KOL feed — independent module. Lists analyzed posts from tracked KOLs
@@ -802,16 +803,15 @@ export default function KolPage({
       <div className="page-head">
         <div>
           <h1 className="page-title">{isZh ? 'KOL 信号' : 'KOL Signals'}</h1>
-          <p className="page-sub">
-            {`Track long-form KOL theses and extracted asset calls · ${posts.length} posts`}
-          </p>
+          <PageHint count={`${posts.length} posts`}>
+            19 crypto KOLs' essays and podcasts ingested daily, AI extracts every
+            ticker call, then cross-checked against the same KOLs' on-chain
+            wallets. Catches "talks vs trades" — when their wallet says the
+            opposite of their tweets.
+          </PageHint>
         </div>
       </div>
 
-      <div style={{ fontSize: 12, color: 'var(--ink-3)', lineHeight: 1.5, marginBottom: 16 }}>
-        This module ingests long-form KOL writing and show notes, extracts explicit asset views with AI, then cross-checks those views against wallet behavior. Open any row to inspect the original text and supporting quote.
-      </div>
-
       <DigestWidget
         isZh={isZh}
         initialDigest={initialDigest}